EXTECH PH60 User Guide

User Guide

pH Waterproof Meter

Models PH60

Description

Front Panel Controls

1. Battery compartment cap

2. LCD Display

3. HOLD /▲ button

4. PWR (On/Off) button

5. Electrode

6. CAL button

7. Electrode cap with sponge

8. Protective cap

Overview

pH Overview

pH is a unit of measure (ranging from 0 to 14pH)indicating the degree of acidity or alkalinity of a solution. pH tests are the most commonly performed measurements in water analysis and reports the hydrogen ion activity of a solution which is an indicator of acidity or alkalinity. Solutions with a pH less than 7 are considered acidic, solutions with apH higher than 7 are known as bases, and solutions with a pH of near7 are neutral.

Getting Started

 Before first use or after extended storage, soak the electrode (with its

cap removed) in a pH 4 solution for at least 30 minutes.

 White KCL crystals may be present in the cap. These crystals will

dissolve in the soak or they can be simply rinsed with tap water.

 Always calibrate close to the expected measurement value.  A sponge is located in the electrode protective cap. Keep this sponge

soaked with a pH 4 solution to preserve Electrode life during storage.

 Unless directed otherwise, a daily two point calibration is

recommended to maintain accuracy and to verify the condition of the meter and electrode.

Operation

pH Measurements

1. Remove the protective cap and the electrode cap

2. Insert the electrode into the sample.

3. Press the PWR key to turn the meter on andslowly stir until the reading settles. The decimal point will blink while the meter is measuring.

pH Calibration (1, 2, or 3 points)

A two point calibration with a buffer of 7 plus4 or 10 (whichever is nearest to the expected sample value) is always recommended. A one point calibration (choose the value closest to the expected sample value) is also valid. For best accuracy, always calibrate at the sample temperature.

1. Place the electrode into a buffer solution (4, 7, or 10) and momentarily press the CAL key. Note: pH 7 should be calibrated first, then 4 and/or 10 pH.

2. If meter successfully recognizes the solution “CAL” and the pH value will appear on the display in two seconds. Note: If the solution is more than 1pH off from the 4, 7,or 10pH standard, the meter will assume an error and abort the calibration. “EN” will be displayed for one second and then the meter will return to normal operation.

3. If the calibration buffer is another value other than 4, 7, or 10, such

as 4.1, press the HLD/▲ button to adjust the value to the correct

reading. The adjustable range for 4pH is from 3.5 to 4.5. for 7pHis from 6.5 to 7.5. For 10pH is from 9.5 to10.5.

4. When calibration is complete, the meter automatically saves the value, displays “SA” and returns to normal operation mode after displaying “EN”.

5. For a two or three point calibration, repeat steps 1-4.

6. Note: Always turn the meter off and then on before calibrating to allow sufficient time to complete the calibrations during one power cycle.

Changing the Displayed Temperature Units

With the meter OFF, press and hold the PWR and CAL buttons untiloF oroC appears in the display. Press the HLD/▲ button to toggle between them. Select the preferred unit and then press CAL to save. “SA” will appear in the display for one second and then return to normal operation.

Data Hold

Momentarily press the HLD/▲ button to freeze the current reading. The HOLD display icon will appear along with the held reading. Momentarily press the HLD/▲ key to return to normal operation.

Auto Power Off Disable

The meter will shut off after 20 minutes to save battery life if no buttons are pressed. To disable this feature, with the meter off, press and hold the PWR and HLD/▲ buttons simultaneously until an “n” appears for 1 second on the display. Release the buttons. Note: Turning the meter off will reactivate the Auto Power Off feature.

Battery Replacement

1. Remove the two screws from the battery compartment cap

2. Replace the four (4) LR44 batteries observing polarity.

3. Replace the battery compartment cap and secure with the screws

You, as the end user, are legally bound (Battery ordinance) to return all used batteries and accumulators; disposal in

the household garbage is prohibited!

You can hand over your used batteries / accumulators at collection points in your community or wherever batteries / accumulators are sold! Disposal: Follow the valid legal stipulations in respect of the disposal of the device at the end of its lifecycle

Specifications

Model PH60 Display Dual LCD PH Range and Accuracy 0.0 to 14.0 PH resolution/accuracy 0.1pH / ± 0.2pH Temperature Range 0 to 50oC (32 to 122oF) Temperature

resolution/accuracy Automatic Temperature

Compensation Waterproof Meets IP67 Power Four (4) LR44 button batteries Auto power off After 20 minutes of inactivity Dimensions 152x37x24mm (6x1.5x0.9”);

form.

0.5o/ ± 1oC / 1.8oF

Yes

65g (2.3oz)

PH60-EU-EN V1.1 7/09